Tcl IPv6 patch

FreeBSD�用�のports base�で�作�成�し�て�あ�り�ま�す�． �な�お�，

�か�っ�て�に socket command�に -inet, -inet6�の�オ�プ�シ�ョ�ン�を�付�け�加�え�ま�し�た�．
-inet, -inet6�の�オ�プ�シ�ョ�ン�が�な�い�場�合�に�はPF_UNSPEC�に�な�り�ま�す�．
�ク�ラ�イ�ア�ン�ト�で�ロ�ー�カ�ル�側�の�ア�ド�レ�ス�をbind�す�る�と�き�に�は�リ�モ�ー�ト�側�と�同�じAddress Family�を�使�用�し�ま�す�．

�以�下�は�パ�ッ�チ�を�当�て�るFreeBSD�用�のports�で�す�．